The new mum has tried to make life hell for Mitzeee in recent weeks, secretly stalking the glamour girl and scheming to keep her out of Riley Costello's affections.
However, Mercedes (Jennifer Metcalfe) receives a shock in early June as she realises that her friend Lynsey Nolan (Karen Hassan) has been the bigger threat all along.
Lynsey and Riley have been keeping their relationship under wraps, but they finally go public during a Jubilee party at the McQueens' house in an upcoming episode.
After striking up a bond of friendship with Lynsey in recent months, exactly how Mercedes will react to the surprising romance remains to be seen…
The latest setback for Mercedes will come just a few days after the devastating blow that Silas Blissett won't stand trial.
Show bosses had previously teased that Mercedes's behaviour would spiral out of control again after learning of the authorities' decision. More details of this have now been revealed with the news that she'll be heading back into the arms of sleazy Doctor Browning again...
The villagers hear the news about Silas on Monday, May 28, while the big Jubilee party at the McQueen house takes place a week later on Monday, June 4.